Im BTS ARMY who loves reading TaeKook/TaeGguk fanfictions, not only because I believe in them but also because some of the stories are just so beautiful and extremely well written. 
Thats why you will only find BTS fanfictions in my reading lists.

I have sorted the stories  I've read personally, in lists so whoever follows me, can easily just open a list and read the kind of story they want to. 
The lists are still a work in progress so you gotta keep checking them for updated names.

Dont ask me my bias, all seven boys are my bias wreckers IRL LOL. 
My fav is OT7 !
BTS was, is and will always be 7 !

P.S - I love Taekook switches personally, coz I see their faces, bodies and expressions in my head when I read their fanfictions. But I dont really care who is top or bottom in fictions. 
Also, TK switch suggestions are more than welcome lol... Gimme recs !